/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 *
 * ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Mozilla Communicator client code, released
 * March 31, 1998.
 *
 * The Initial Developer of the Original Code is
 * Sun Microsystems, Inc.
 * Portions created by the Initial Developer are Copyright (C) 1998
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either of the GNU General Public License Version 2 or later (the "GPL"),
 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
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 * ***** END LICENSE BLOCK ***** */


/* @(#)w_pow.c 1.3 95/01/18 */
/*
 * ====================================================
 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
 *
 * Developed at SunSoft, a Sun Microsystems, Inc. business.
 * Permission to use, copy, modify, and distribute this
 * software is freely granted, provided that this notice 
 * is preserved.
 * ====================================================
 */

/* 
 * wrapper pow(x,y) return x**y
 */

#include "fdlibm.h"


#ifdef __STDC__
	double fd_pow(double x, double y)	/* wrapper pow */
#else
	double fd_pow(x,y)			/* wrapper pow */
	double x,y;
#endif
{
#ifdef _IEEE_LIBM
	return  __ieee754_pow(x,y);
#else
	double z;
    int err;
	z=__ieee754_pow(x,y);
	if(_LIB_VERSION == _IEEE_|| fd_isnan(y)) return z;
	if(fd_isnan(x)) {
	    if(y==0.0) 
	        return __kernel_standard(x,y,42,&err); /* pow(NaN,0.0) */
	    else 
		return z;
	}
	if(x==0.0){ 
	    if(y==0.0)
	        return __kernel_standard(x,y,20,&err); /* pow(0.0,0.0) */
	    if(fd_finite(y)&&y<0.0)
	        return __kernel_standard(x,y,23,&err); /* pow(0.0,negative) */
	    return z;
	}
	if(!fd_finite(z)) {
	    if(fd_finite(x)&&fd_finite(y)) {
	        if(fd_isnan(z))
	            return __kernel_standard(x,y,24,&err); /* pow neg**non-int */
	        else 
	            return __kernel_standard(x,y,21,&err); /* pow overflow */
	    }
	} 
	if(z==0.0&&fd_finite(x)&&fd_finite(y))
	    return __kernel_standard(x,y,22,&err); /* pow underflow */
	return z;
#endif
}
